DRY Slides with ---
Never repeat yourself, let Quarto do it
Quarto Extension
The Problem
Too much content, not enough slides
When a topic spans multiple slides, you end up writing the same heading over and over:
This violates the DRY principle and makes refactoring painful.
The Solution
The cascade extension
A filter that repeats the heading chain automatically when you use --- to create a new slide.
- Works only for
revealjsoutput. - Repeats the full heading hierarchy, not just the immediate title.
The cascade extension
This very slide was created with ---.
No heading was written in the source; it was repeated from the previous slide.
Nested headings work too
Deep dive
Content under a nested heading structure.
Nested headings work too
Still diving
Both ## Nested headings work too and ### Still diving on the slide. Only parent headings above this ### level are repeated from the previous slide.
Before and After
Before: repetitive markdown
After: DRY markdown
Fewer lines, single source of truth for headings, and zero risk of typos.